Improvement in fire-proof columns



P. B.. WIGI-IT. Fire-Proof Column.

7 No; 203,912.v y'Parenteel May 21,1878.

UNITED STATES PATENT OEEIcE PETER B. WIGHT, OF CHICAGO, ILLINOIS,ASSIGNOR OF ONE-HALF HIS RIGHT TO HARVEY B. MERRELL, OF MORRISTOWN, NEWJERSEY, AND THOMAS FERGUSON, OF DETROIT, MICHIGAN.

IMPROVEMENT IN FIRE-PROOF COLUMNS.

Specification forming part of Letters Patent No. 203,972, dated May 21,1878; application filed February 26, 1877.

To all whom it may concern:

Be it known that I, PETER B. WIGET, of

I the city of Chicago, in the county of Cook and State of Illinois, haveinvented certain newy and useful Improvements in Fire-Proof Columns; andI do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification. g

` The object of this invention is to render Ere-proof round orcylindrical iron columns; and consists in surrounding the same withblocks of porous terra-cotta, concrete, iirebrick, or otherincombustible and non-conducting material, made with rabbets at top andbottom, and secured in place by being set with joints of plaster, gagedmortar, or cement, and then bound and fastened by a wire thong or hoopof metal, as hereinafter described. l

Figure l is a perspective view of a section of a column, showing thecore partially exposed; and Fig. 2 is a horizontal section on the line xx, Fig. 1.

In the drawings, A represents a round or cylindrical iron column; and B,blocks of porous terra-cotta, concrete, fire-brick, or otherincombustible and nonconducting material. These blocks are made with arabbet, a, at top and bottom, and of the proper form to inclose thecolumn A, as shown clearly in Fig. 1. They are arranged in courses aboutthe column, and are set with joints of plaster, gaged` mortar, orcement, so that each course will be in a horizontal line, and theirrabbets in a like horizontal line, as shown in both figures. When theblocks of each course are thus set, they are secured by a wire thong, b,or hoop of metal, arranged in the rabbet at the top of the blocks, asshownin the figures. The rst course is set around the bottom of thecolumn and fastened. The next is set and secured in like manner; but inbeing so set its lower rabbet overlaps the wire thong or hoop of metal,fastening the course next below, and thus entirely conceals and protectsit, at the same leaving the exterior surface smooth and in. conditionfor any desired ornamentation.

The same method of' fire-prooing may be applied to columns having anynumber of sides by making the blocks of the requisite shape to t closelyabout them.

I am aware that fire-proof blocks, rabbeted at top and bottom have beensecured about an iron column by dowels cemented in holes therein, or byiron pins, or by hooks, and that annular tension bars or rods have beeninserted in the walls of grain-bins and other similar `structures ofmasonry. These I do not claim; but

What I do claim is- In combination with the iron column and/ theincombustible and non-conducting rabbeted blocks, the wire bands orhoops, covered and protected in joints of the blocks, substantially asshown and described.

In testimony that I claim the foregoing as my own I aflix my signaturein presence of two witnesses.

Y PETER B. WIGHT;

Witnesses:

HENRY S. J AEFRAY,

DANIEL P. WIGHT.

